Originally Posted by MacDracor
I'm not saying that using tap water today will kill your fish today. That would be nonsense. However, tap water can contain a lot of stuff we don't want in our tanks. And it can bind to the rock and sand and build up for years, much like copper can. So yes, after years of using tap water, tap water can kill your fish.
Chunks? Chunks of sand? That does not sound right. Why is your sand chunky? How deep is it, and what size of chunks were you removing?
More like flakes, and all sizes. Sand is about 2 inches